Yes, understood. Thanks. Am just trying my best to keep entities in
isolation unless am really forced to group them.
There is this use case in my example:
User while creating a Exam, will create, edit, delete any Page,
Question, Answer as they wish.
At regular intervals, say 1 min, i will persist
Ah, i missed an important piece.
You are right, Didier. Making all entities to be isolated doesn't seem
to work out, atleast because of this important use case, in my
example:
All Pages will be in particular *order* under any Exam and similarly,
all Questions will be in some *order* as well under
Sorry again, another use case:
a Question can be moved to any Page while creating any Exam - so if
have Parent-Child relation between Page-Question,
i might need to delete Question and recreate it with new Parent - BAD
IDEA as told by Jeff in post that i mentioned.
i gave up!
On Dec 18, 1:22 pm,
The first query, is a key-only merge-join query.
Then I fetch the parents of the results (this is the technique
suggested by Brett
Slatkin at Building Scalable, Complex Apps on App Engine)
When I get those parents, I get a key field from them and fetch it from the
datastore. (I am making some
Thank you, I'll try it as soon as possible.
I did try to use the jars from a standard J2ee distribution (not
repackaged), but that did not work since some libraries were still
missing.
Thanks for your suggestion, this will be really helpful.
Lorenzo
On Dec 18, 4:12 am, Helder Suzuki
Well, my approach was to us a listsrv that way I'm only technically sending
to one address but the list manager is then forwarding it along :-)
Sent from my iPhone
On Dec 18, 2010, at 2:56 AM, Fabrizio Accatino fht...@gmail.com wrote:
... or enqueue your outgoing message on a task queue with a
I got the same problem since today. Changing the version number did
not change anything. Maybe a Google server problem?
someone had this problem in 2009. So this is possibly not a new
problem...
http://www.mail-archive.com/google-appengine-java@googlegroups.com/msg03589.html
On 17 Dez., 09:02,
Hi ,
I have a simple class with unencoded string as key. I am changing the
values of key by one place like user1, user11,
user111,user so on. it added two record our of 10 different
values. I am testing locally. Appears like it is
replacing object instead of adding. If I change to Long - it
we are continually working on improving the overall reliability, but
on some occasions, the system will experience higher than normal
latencies within the underlying infrastructure, which may manifest
itself to users in the form of upload issues, timeouts
(DeadlineExceeded), or other server 500
Hi,
I'm facing a peculiar issue. One of my JSPs uses
javax.servlet.jsp.jstl.fmt.LocaleSupport.getLocalizedMessage to get
localized message from resource bundles. I have copied the jakarta-
taglibs-standard-1.1.2.jar and jakarta-taglibs-jstl-1.1.2.jar into WEB-
INF/lib directory. On my local SDK
Hi ! I have a problem when I persist and add a child (class Equipo)
of an existent class( This class father already persisted, class
Fecha). The child class is not persisted and the error is:
Primary key for object of type Equipo is null.
Caused by:
java.lang.IllegalStateException: Primary
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